[Slaam] SLAAM Seminar Monday, Feb 13: Yongtian Luo (Johns Hopkins)

Wed Feb 8 13:45:14 PST 2023

My apologies for giving the incorrect time zone in the last email’s subject line. As usual, SLAAM will be held at 9am Pacific/12 noon Eastern time.
Best,
Dan

Daniel Beller
Assistant Professor
Department of Physics and Astronomy
Johns Hopkins University
pages.jh.edu/dbeller3
(he/him/his)

From: Slaam <slaam-bounces at lists.ucmerced.edu> on behalf of SLAAM Distribution List <slaam at lists.ucmerced.edu>
Date: Wednesday, February 8, 2023 at 4:41 PM
To: slaam at lists.ucmerced.edu <slaam at lists.ucmerced.edu>
Subject: [Slaam] SLAAM Seminar Monday, Feb 13, 9am ET: Yongtian Luo (Johns Hopkins)
Dear enthusiasts of the SLAAM seminars,

We invite you to join us for the next Soft Living Active and Adaptive Matter (SLAAM)<https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fphysics.ucmerced.edu%2Fslaam&data=05%7C01%7Cd.a.beller%40jhu.edu%7C5afa44fcce434f0efed608db0463b5d6%7C9fa4f438b1e6473b803f86f8aedf0dec%7C0%7C0%7C638108599445499851%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=PBY52JD%2BmGUUGF48zMYVIP3w5wYFE3TwNtJxP6flmgY%3D&reserved=0> seminar, to be given by Dr. Yongtian Luo (Johns Hopkins) on Monday, February 13, at 9am Pacific/11am Central/12 noon Eastern time, with the title “Modeling the Hydrodynamic and Mechanical Effects of Fluid-Storing Biological Flow Networks.”

https://ucmerced.zoom.us/j/92693607475?pwd=TnI5dDhRRnYvejNZK2xNN0s4M0R5UT09
Zoom Meeting ID: 926 9360 7475   |   Passcode: 223642

As usual, there will be a 15 min informal Q&A at the end of the hour. Graduate students will have an opportunity to interact with the speaker in an informal setting during the "Meet the speaker" timeslot just after the talk. Please join if the time works for you.

Abstract:
Biological flow networks, which are widespread in both animals and plants, play important roles in the physiological functions of these living systems through various effects on their hydrodynamic and mechanical properties. In plant biology, water-delivery vascular networks consisting mainly of xylem vessels are essential not only for keeping tissues hydrated and sustaining necessary fluid status (water potential or fluid content), but also for controlling certain hydraulically related motions involving large-scale shape changes such as petal expansion and deformations in flower blooming, with the help of water-storing cells in leaves or petals. Using a flow network model with local hydraulic conductance and fluid-storage capacitance, we theoretically study the water status dynamics of a model grass leaf under water stress to illustrate the significance of capacitor cells in the leaf's resilience against drought conditions. In order to study the shape morphing of a thin sheet controlled by its embedded flow network (as in a petal), we coupled the capacitive network model to a mechanical network (spring system describing the shape of the surface) to simulate its differential swelling and buckling processes, exploring the effects of venation architecture and hierarchies on the deformation pathways by using the minimal coupling model. These shape patterns reveal the underlying fluid distribution and mechanical changes, and may offer clues to the design and manufacture of thin materials whose shapes can be manipulated by adjusting internal hydraulics.

About the speaker:
Yongtian Luo is a postdoctoral fellow at the Johns Hopkins University, working with Prof. Brian Camley in the field of theoretical and computational soft matter and biological physics. Previously, he was a postdoctoral researcher at the University of Pennsylvania in the group of Prof. Eleni Katifori, studying the effects of flow networks in plant biology and thin elastic structures, particularly leaf hydraulics and petal shape transformations, using theoretical models and computer simulations. Yongtian earned his PhD in chemistry from the University of Washington where he studied the phase separation and deformation of lipid-bilayer membranes. Currently, he is working on the modeling of cell migration in extracellular matrix, especially the movement and interactions of fibroblasts on a nanofiber network, in the Camley group at JHU.

See you there!

Best regards,
Dan Beller
on behalf of the SLAAM organizing team

To join the SLAAM mailing list, please sign up here<https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__docs.google.com_forms_d_e_1FAIpQLScTyzEuuE7TfrrapgP4tzN-5FoPSqbBhURUxa9-2Dzc8USnY1IPzA_viewform%26d%3DDwMFAw%26c%3DWO-RGvefibhHBZq3fL85hQ%26r%3D6T170XR90Za4-nl9r1e8-WfEJbvH5g5hJbA9UumqfWQ%26m%3DNK4EGo1VvrDiYSxdvOUJXgCkEAzTrQzNpQi-P59LZiKL_lMA3briJm9KQh9Y3suN%26s%3D3hc1lEhiJwBLtMEr12Z9K5XtZaVlEfOZKYXGtXCjRDg%26e%3D&data=05%7C01%7Cd.a.beller%40jhu.edu%7C5afa44fcce434f0efed608db0463b5d6%7C9fa4f438b1e6473b803f86f8aedf0dec%7C0%7C0%7C638108599445499851%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=M9Hfw2Bqz75TW2j%2BJpTmfSjW43MCX0SzoJHMoGOLVbs%3D&reserved=0>. If you’re a postdoc interested in giving a SLAAM talk, we invite you to register your interest on that webform.

Daniel Beller
Assistant Professor
Department of Physics and Astronomy
Johns Hopkins University
pages.jh.edu/dbeller3<http://pages.jh.edu/dbeller3>
(he/him/his)

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